47321213 has 4 divisors (see below), whose sum is σ = 47622780. Its totient is φ = 47019648.

The previous prime is 47321201. The next prime is 47321231. The reversal of 47321213 is 31212374.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17749369 + 29571844 = 4213^2 + 5438^2 .

It is a cyclic number.

It is not a de Polignac number, because 47321213 - 2⁸ = 47320957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47321293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150548 + ... + 150861.

It is an arithmetic number, because the mean of its divisors is an integer number (11905695).

Almost surely, 2^47321213 is an apocalyptic number.

It is an amenable number.

47321213 is a deficient number, since it is larger than the sum of its proper divisors (301567).

47321213 is a wasteful number, since it uses less digits than its factorization.

47321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301566.

The product of its digits is 1008, while the sum is 23.

The square root of 47321213 is about 6879.0415756848. The cubic root of 47321213 is about 361.7028711683.

Adding to 47321213 its reverse (31212374), we get a palindrome (78533587).

The spelling of 47321213 in words is "forty-seven million, three hundred twenty-one thousand, two hundred thirteen".